Digital Radio Mondiale (DRM) - System Specification

The present document gives the specification for the Digital Radio Mondiale (DRM) system for digital transmissions in
the broadcasting bands below 300 MHz.
With respect to the previous published version, the present document removes unused modulation features and defines
additional text handling features.

Digitalni radio Mondiale (DRM) - Sistemska specifikacija

General Information

Status
Published
Publication Date
15-Apr-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
06-Apr-2021
Due Date
11-Jun-2021
Completion Date
16-Apr-2021

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ETSI ES 201 980 V4.2.1 (2021-01)
ETSI STANDARD
Digital Radio Mondiale (DRM);
System Specification
---------------------- Page: 1 ----------------------
2 ETSI ES 201 980 V4.2.1 (2021-01)
Reference
RES/JTC-DRM-35
Keywords
broadcasting, digital, DRM, radio
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search

The present document may be made available in electronic versions and/or in print. The content of any electronic and/or

print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any

existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI

deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.

Users of the present document should be aware that the document may be subject to revision or change of status.

Information on the current status of this and other ETSI documents is available at

https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx

If you find errors in the present document, please send your comment to one of the following services:

https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification

No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying

and microfilm except as authorized by written permission of ETSI.

The content of the PDF version shall not be modified without the written authorization of ETSI.

The copyright and the foregoing restriction extend to reproduction in all media.
© ETSI 2021.
© European Broadcasting Union 2021.
All rights reserved.

DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and

of the 3GPP Organizational Partners.

oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and

of the oneM2M Partners.
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
---------------------- Page: 2 ----------------------
3 ETSI ES 201 980 V4.2.1 (2021-01)
Contents

Intellectual Property Rights ................................................................................................................................ 8

Foreword ............................................................................................................................................................. 8

Modal verbs terminology .................................................................................................................................... 8

Introduction ........................................................................................................................................................ 9

1 Scope ...................................................................................................................................................... 10

2 References .............................................................................................................................................. 10

2.1 Normative references ....................................................................................................................................... 10

2.2 Informative references ...................................................................................................................................... 11

3 Definition of terms, symbols, abbreviations and conventions ................................................................ 11

3.1 Terms ................................................................................................................................................................ 11

3.2 Symbols ............................................................................................................................................................ 12

3.3 Abbreviations ................................................................................................................................................... 13

3.4 Conventions ...................................................................................................................................................... 14

4 General characteristics ........................................................................................................................... 15

4.1 System overview .............................................................................................................................................. 15

4.2 System architecture .......................................................................................................................................... 15

4.3 Audio source coding ......................................................................................................................................... 17

4.4 Transmission modes ......................................................................................................................................... 18

4.4.1 Signal bandwidth related parameters .......................................................................................................... 18

4.4.2 Transmission efficiency related parameters ................................................................................................ 18

4.4.2.0 General .................................................................................................................................................. 18

4.4.2.1 Coding rates and constellations ............................................................................................................. 18

4.4.2.2 OFDM parameter set ............................................................................................................................. 18

5 Source coding modes.............................................................................................................................. 19

5.1 Overview .......................................................................................................................................................... 19

5.1.0 Introduction................................................................................................................................................. 19

5.1.1 Extended HE-AAC audio coding (xHE-AAC) ........................................................................................... 20

5.1.2 AAC audio coding ...................................................................................................................................... 20

5.1.3 MPEG Surround coding .............................................................................................................................. 22

5.2 Audio super framing ......................................................................................................................................... 22

5.3 xHE-AAC coding ............................................................................................................................................. 23

5.3.1 xHE-AAC ................................................................................................................................................... 23

5.3.1.0 Introduction ........................................................................................................................................... 23

5.3.1.1 xHE-AAC audio super frame ................................................................................................................ 24

5.3.1.2 xHE-AAC audio frame ......................................................................................................................... 25

5.3.1.3 Transport of xHE-AAC audio frames within the payload section ........................................................ 25

5.3.2 xHE-AAC decoder configuration ............................................................................................................... 27

5.3.3 xHE-AAC error concealment ..................................................................................................................... 30

5.3.3.0 Introduction ........................................................................................................................................... 30

5.3.3.1 Frequency Domain coding (AAC based coding and TCX) ................................................................... 30

5.3.3.2 ACELP .................................................................................................................................................. 31

5.3.3.3 SBR ....................................................................................................................................................... 31

5.3.3.4 MPS212 parametric stereo .................................................................................................................... 34

5.3.3.5 MDCT based Complex Prediction ........................................................................................................ 34

5.3.3.6 Forward Aliasing Cancellation.............................................................................................................. 34

5.3.4 xHE-AAC + MPS ....................................................................................................................................... 34

5.4 AAC coding...................................................................................................................................................... 35

5.4.1 AAC ............................................................................................................................................................ 35

5.4.2 AAC + SBR ................................................................................................................................................ 37

5.4.3 Parametric Stereo coding ............................................................................................................................ 38

5.4.4 AAC error concealment .............................................................................................................................. 39

5.4.4.0 Introduction ........................................................................................................................................... 39

5.4.4.1 Interpolation of one corrupt frame ........................................................................................................ 39

ETSI
---------------------- Page: 3 ----------------------
4 ETSI ES 201 980 V4.2.1 (2021-01)

5.4.4.2 Fade-out and fade-in ............................................................................................................................. 40

5.4.4.3 Concealment granularity ....................................................................................................................... 40

5.4.4.4 SBR error concealment ......................................................................................................................... 40

5.4.4.5 Parametric Stereo concealment ............................................................................................................. 43

5.4.5 AAC + MPS ................................................................................................................................................ 43

6 Multiplex definition ................................................................................................................................ 45

6.1 Introduction ...................................................................................................................................................... 45

6.2 Main Service Channel (MSC) .......................................................................................................................... 45

6.2.1 Introduction................................................................................................................................................. 45

6.2.2 Structure ...................................................................................................................................................... 45

6.2.3 Building the MSC ....................................................................................................................................... 45

6.2.4 Reconfiguration .......................................................................................................................................... 46

6.3 Fast Access Channel (FAC) ............................................................................................................................. 46

6.3.1 Introduction................................................................................................................................................. 46

6.3.2 Structure ...................................................................................................................................................... 46

6.3.3 Channel parameters..................................................................................................................................... 46

6.3.4 Service parameters ...................................................................................................................................... 49

6.3.5 CRC ............................................................................................................................................................ 51

6.3.6 FAC repetition ............................................................................................................................................ 51

6.4 Service Description Channel (SDC) ................................................................................................................. 52

6.4.1 Introduction................................................................................................................................................. 52

6.4.2 Structure ...................................................................................................................................................... 52

6.4.3 Data entities ................................................................................................................................................ 53

6.4.3.0 Introduction ........................................................................................................................................... 53

6.4.3.1 Multiplex description data entity - type 0 ............................................................................................. 54

6.4.3.2 Label data entity - type 1 ....................................................................................................................... 54

6.4.3.3 Conditional access parameters data entity - type 2 ............................................................................... 55

6.4.3.4 Alternative frequency signalling: Multiple frequency network information data entity - type 3 .......... 56

6.4.3.5 Alternative frequency signalling: Schedule definition data entity - type 4 ........................................... 58

6.4.3.6 Application information data entity - type 5 ......................................................................................... 58

6.4.3.7 Announcement support and switching data entity - type 6 ................................................................... 60

6.4.3.8 Alternative frequency signalling: Region definition data entity - type 7 .............................................. 62

6.4.3.9 Time and date information data entity - type 8 ..................................................................................... 63

6.4.3.10 Audio information data entity - type 9 .................................................................................................. 63

6.4.3.11 FAC channel parameters data entity - type 10 ...................................................................................... 66

6.4.3.12 Alternative frequency signalling: Other services data entity - type 11.................................................. 67

6.4.3.13 Language and country data entity - type 12 .......................................................................................... 71

6.4.3.14 Alternative frequency signalling: detailed region definition data entity - type 13 ................................ 71

6.4.3.15 Packet stream FEC parameters data entity - type 14 ............................................................................. 72

6.4.3.16 Extension data entity - type 15 .............................................................................................................. 73

6.4.3.16.0 General ............................................................................................................................................ 73

6.4.3.16.1 Service linking information data entity - type 15, extension 0 ........................................................ 73

6.4.3.16.2 Other data entity type 15 extensions ................................................................................................ 74

6.4.4 Summary of data entity characteristics ....................................................................................................... 75

6.4.5 Changing the content of the SDC ............................................................................................................... 76

6.4.6 Signalling of reconfigurations..................................................................................................................... 77

6.4.6.0 Introduction ........................................................................................................................................... 77

6.4.6.1 Service reconfigurations ........................................................................................................................ 77

6.4.6.2 Channel reconfigurations ...................................................................................................................... 78

6.5 Text message application ................................................................................................................................. 78

6.6 Packet mode ..................................................................................................................................................... 80

6.6.0 Introduction................................................................................................................................................. 80

6.6.1 Packet structure ........................................................................................................................................... 80

6.6.1.0 Introduction ........................................................................................................................................... 80

6.6.1.1 Header ................................................................................................................................................... 81

6.6.1.2 Data field ............................................................................................................................................... 81

6.6.2 Asynchronous streams ................................................................................................................................ 82

6.6.3 Files ............................................................................................................................................................ 82

6.6.4 Choosing the packet length ......................................................................................................................... 82

6.6.5 Forward Error Correction (FEC) for packet mode streams ......................................................................... 82

6.6.5.0 Introduction ........................................................................................................................................... 82

ETSI
---------------------- Page: 4 ----------------------
5 ETSI ES 201 980 V4.2.1 (2021-01)

6.6.5.1 Encoding of FEC Packets ...................................................................................................................... 83

6.6.5.2 Transport of FEC packets ...................................................................................................................... 85

6.6.5.3 Receiver considerations ........................................................................................................................ 86

6.7 Presentation of service labels and text messages .............................................................................................. 86

6.7.1 Introduction................................................................................................................................................. 86

6.7.2 Encoding of the text control field ............................................................................................................... 87

6.7.3 Transport of the text control field ............................................................................................................... 88

6.7.3.1 SDC data entity type 1 labels ................................................................................................................ 88

6.7.3.2 Text messages ....................................................................................................................................... 89

6.7.4 Display of RTL and bidirectional text ........................................................................................................ 89

6.7.4.1 Introduction ........................................................................................................................................... 89

6.7.4.2 Minimum RTL implementation ............................................................................................................ 89

6.7.4.3 Simplified bidirectional algorithm ........................................................................................................ 90

7 Channel coding and modulation ............................................................................................................. 91

7.1 Introduction ...................................................................................................................................................... 91

7.2 Transport multiplex adaptation and energy dispersal ....................................................................................... 92

7.2.1 Transport multiplex adaptation ................................................................................................................... 92

7.2.1.0 General .................................................................................................................................................. 92

7.2.1.1 MSC ...................................................................................................................................................... 92

7.2.1.2 FAC ....................................................................................................................................................... 93

7.2.1.3 SDC ....................................................................................................................................................... 93

7.2.2 Energy dispersal .......................................................................................................................................... 94

7.3 Coding .............................................................................................................................................................. 95

7.3.1 Multilevel coding ........................................................................................................................................ 95

7.3.1.0 Introduction ........................................................................................................................................... 95

7.3.1.1 Partitioning of the bitstream .................................................................................................................. 96

7.3.2 Component code ......................................................................................................................................... 97

7.3.3 Bit interleaving ......................................................................................................................................... 103

7.3.3.0 Introduction ......................................................................................................................................... 103

7.3.3.1 FAC ..................................................................................................................................................... 103

7.3.3.2 SDC ..................................................................................................................................................... 104

7.3.3.3 MSC .................................................................................................................................................... 104

7.4 Signal constellations and mapping ................................................................................................................. 105

7.5 Application of coding to the channels ............................................................................................................ 107

7.5.1 Coding the MSC ....................................................................................................................................... 107

7.5.1.0 Introduction ......................................................................................................................................... 107

7.5.1.1 Coding ................................................................................................................................................. 107

7.5.2 Coding the SDC ........................................................................................................................................ 108

7.5.3 Coding the FAC ........................................................................................................................................ 109

7.6 MSC cell interleaving ..................................................................................................................................... 109

7.7 Mapping of MSC cells on the transmission super frame structure ................................................................. 111

8 Transmission structure ......................................................................................................................... 112

8.1 Transmission frame structure and robustness modes ..................................................................................... 112

8.2 Propagation-related OFDM parameters .......................................................................................................... 114

8.3 Signal bandwidth related parameters .............................................................................................................. 114

8.3.1 Parameter definition .................................................................................................................................. 114

8.3.2 Simulcast transmission ............................................................................................................................. 116

8.4 Pilot cells ........................................................................................................................................................ 116

8.4.1 Functions and derivation ........................................................................................................................... 116

8.4.2 Frequency references ................................................................................................................................ 116

8.4.2.0 Introduction ......................................................................................................................................... 116

8.4.2.1 Cell positions....................................................................................................................................... 117

8.4.2.2 Cell gains and phases .......................................................................................................................... 117

8.4.3 Time references ........................................................................................................................................ 118

8.4.3.0 Introduction ......................................................................................................................................... 118

8.4.3.1 Cell positions and phases .................................................................................................................... 118

8.4.3.2 Cell gains ............................................................................................................................................ 121

8.4.4 Gain references ....................................................................................................

...

Final draft ETSI ES 201 980 V4.2.1 (2020-11)
ETSI STANDARD
Digital Radio Mondiale (DRM);
System Specification
---------------------- Page: 1 ----------------------
2 Final draft ETSI ES 201 980 V4.2.1 (2020-11)
Reference
RES/JTC-DRM-35
Keywords
broadcasting, digital, DRM, radio
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search

The present document may be made available in electronic versions and/or in print. The content of any electronic and/or

print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any

existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI

deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.

Users of the present document should be aware that the document may be subject to revision or change of status.

Information on the current status of this and other ETSI documents is available at

https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx

If you find errors in the present document, please send your comment to one of the following services:

https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification

No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying

and microfilm except as authorized by written permission of ETSI.

The content of the PDF version shall not be modified without the written authorization of ETSI.

The copyright and the foregoing restriction extend to reproduction in all media.
© ETSI 2020.
© European Broadcasting Union 2020.
All rights reserved.

DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and

of the 3GPP Organizational Partners.

oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and

of the oneM2M Partners.
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
---------------------- Page: 2 ----------------------
3 Final draft ETSI ES 201 980 V4.2.1 (2020-11)
Contents

Intellectual Property Rights ................................................................................................................................ 8

Foreword ............................................................................................................................................................. 8

Modal verbs terminology .................................................................................................................................... 8

Introduction ........................................................................................................................................................ 9

1 Scope ...................................................................................................................................................... 10

2 References .............................................................................................................................................. 10

2.1 Normative references ....................................................................................................................................... 10

2.2 Informative references ...................................................................................................................................... 11

3 Definition of terms, symbols, abbreviations and conventions ................................................................ 11

3.1 Terms ................................................................................................................................................................ 11

3.2 Symbols ............................................................................................................................................................ 12

3.3 Abbreviations ................................................................................................................................................... 13

3.4 Conventions ...................................................................................................................................................... 14

4 General characteristics ........................................................................................................................... 15

4.1 System overview .............................................................................................................................................. 15

4.2 System architecture .......................................................................................................................................... 15

4.3 Audio source coding ......................................................................................................................................... 17

4.4 Transmission modes ......................................................................................................................................... 18

4.4.1 Signal bandwidth related parameters .......................................................................................................... 18

4.4.2 Transmission efficiency related parameters ................................................................................................ 18

4.4.2.0 General .................................................................................................................................................. 18

4.4.2.1 Coding rates and constellations ............................................................................................................. 18

4.4.2.2 OFDM parameter set ............................................................................................................................. 18

5 Source coding modes.............................................................................................................................. 19

5.1 Overview .......................................................................................................................................................... 19

5.1.0 Introduction................................................................................................................................................. 19

5.1.1 Extended HE-AAC audio coding (xHE-AAC) ........................................................................................... 20

5.1.2 AAC audio coding ...................................................................................................................................... 20

5.1.3 MPEG Surround coding .............................................................................................................................. 22

5.2 Audio super framing ......................................................................................................................................... 22

5.3 xHE-AAC coding ............................................................................................................................................. 23

5.3.1 xHE-AAC ................................................................................................................................................... 23

5.3.1.0 Introduction ........................................................................................................................................... 23

5.3.1.1 xHE-AAC audio super frame ................................................................................................................ 24

5.3.1.2 xHE-AAC audio frame ......................................................................................................................... 25

5.3.1.3 Transport of xHE-AAC audio frames within the payload section ........................................................ 25

5.3.2 xHE-AAC decoder configuration ............................................................................................................... 27

5.3.3 xHE-AAC error concealment ..................................................................................................................... 30

5.3.3.0 Introduction ........................................................................................................................................... 30

5.3.3.1 Frequency Domain coding (AAC based coding and TCX) ................................................................... 30

5.3.3.2 ACELP .................................................................................................................................................. 31

5.3.3.3 SBR ....................................................................................................................................................... 31

5.3.3.4 MPS212 parametric stereo .................................................................................................................... 34

5.3.3.5 MDCT based Complex Prediction ........................................................................................................ 34

5.3.3.6 Forward Aliasing Cancellation.............................................................................................................. 34

5.3.4 xHE-AAC + MPS ....................................................................................................................................... 34

5.4 AAC coding...................................................................................................................................................... 35

5.4.1 AAC ............................................................................................................................................................ 35

5.4.2 AAC + SBR ................................................................................................................................................ 37

5.4.3 Parametric Stereo coding ............................................................................................................................ 38

5.4.4 AAC error concealment .............................................................................................................................. 39

5.4.4.0 Introduction ........................................................................................................................................... 39

5.4.4.1 Interpolation of one corrupt frame ........................................................................................................ 39

ETSI
---------------------- Page: 3 ----------------------
4 Final draft ETSI ES 201 980 V4.2.1 (2020-11)

5.4.4.2 Fade-out and fade-in ............................................................................................................................. 40

5.4.4.3 Concealment granularity ....................................................................................................................... 40

5.4.4.4 SBR error concealment ......................................................................................................................... 40

5.4.4.5 Parametric Stereo concealment ............................................................................................................. 43

5.4.5 AAC + MPS ................................................................................................................................................ 43

6 Multiplex definition ................................................................................................................................ 45

6.1 Introduction ...................................................................................................................................................... 45

6.2 Main Service Channel (MSC) .......................................................................................................................... 45

6.2.1 Introduction................................................................................................................................................. 45

6.2.2 Structure ...................................................................................................................................................... 45

6.2.3 Building the MSC ....................................................................................................................................... 45

6.2.4 Reconfiguration .......................................................................................................................................... 46

6.3 Fast Access Channel (FAC) ............................................................................................................................. 46

6.3.1 Introduction................................................................................................................................................. 46

6.3.2 Structure ...................................................................................................................................................... 46

6.3.3 Channel parameters..................................................................................................................................... 46

6.3.4 Service parameters ...................................................................................................................................... 49

6.3.5 CRC ............................................................................................................................................................ 51

6.3.6 FAC repetition ............................................................................................................................................ 51

6.4 Service Description Channel (SDC) ................................................................................................................. 52

6.4.1 Introduction................................................................................................................................................. 52

6.4.2 Structure ...................................................................................................................................................... 52

6.4.3 Data entities ................................................................................................................................................ 53

6.4.3.0 Introduction ........................................................................................................................................... 53

6.4.3.1 Multiplex description data entity - type 0 ............................................................................................. 54

6.4.3.2 Label data entity - type 1 ....................................................................................................................... 54

6.4.3.3 Conditional access parameters data entity - type 2 ............................................................................... 55

6.4.3.4 Alternative frequency signalling: Multiple frequency network information data entity - type 3 .......... 56

6.4.3.5 Alternative frequency signalling: Schedule definition data entity - type 4 ........................................... 58

6.4.3.6 Application information data entity - type 5 ......................................................................................... 58

6.4.3.7 Announcement support and switching data entity - type 6 ................................................................... 60

6.4.3.8 Alternative frequency signalling: Region definition data entity - type 7 .............................................. 62

6.4.3.9 Time and date information data entity - type 8 ..................................................................................... 63

6.4.3.10 Audio information data entity - type 9 .................................................................................................. 63

6.4.3.11 FAC channel parameters data entity - type 10 ...................................................................................... 66

6.4.3.12 Alternative frequency signalling: Other services data entity - type 11.................................................. 67

6.4.3.13 Language and country data entity - type 12 .......................................................................................... 71

6.4.3.14 Alternative frequency signalling: detailed region definition data entity - type 13 ................................ 71

6.4.3.15 Packet stream FEC parameters data entity - type 14 ............................................................................. 72

6.4.3.16 Extension data entity - type 15 .............................................................................................................. 73

6.4.3.16.0 General ............................................................................................................................................ 73

6.4.3.16.1 Service linking information data entity - type 15, extension 0 ........................................................ 73

6.4.3.16.2 Other data entity type 15 extensions ................................................................................................ 74

6.4.4 Summary of data entity characteristics ....................................................................................................... 75

6.4.5 Changing the content of the SDC ............................................................................................................... 76

6.4.6 Signalling of reconfigurations..................................................................................................................... 77

6.4.6.0 Introduction ........................................................................................................................................... 77

6.4.6.1 Service reconfigurations ........................................................................................................................ 77

6.4.6.2 Channel reconfigurations ...................................................................................................................... 78

6.5 Text message application ................................................................................................................................. 78

6.6 Packet mode ..................................................................................................................................................... 80

6.6.0 Introduction................................................................................................................................................. 80

6.6.1 Packet structure ........................................................................................................................................... 80

6.6.1.0 Introduction ........................................................................................................................................... 80

6.6.1.1 Header ................................................................................................................................................... 81

6.6.1.2 Data field ............................................................................................................................................... 81

6.6.2 Asynchronous streams ................................................................................................................................ 82

6.6.3 Files ............................................................................................................................................................ 82

6.6.4 Choosing the packet length ......................................................................................................................... 82

6.6.5 Forward Error Correction (FEC) for packet mode streams ......................................................................... 82

6.6.5.0 Introduction ........................................................................................................................................... 82

ETSI
---------------------- Page: 4 ----------------------
5 Final draft ETSI ES 201 980 V4.2.1 (2020-11)

6.6.5.1 Encoding of FEC Packets ...................................................................................................................... 83

6.6.5.2 Transport of FEC packets ...................................................................................................................... 85

6.6.5.3 Receiver considerations ........................................................................................................................ 86

6.7 Presentation of service labels and text messages .............................................................................................. 86

6.7.1 Introduction................................................................................................................................................. 86

6.7.2 Encoding of the text control field ............................................................................................................... 87

6.7.3 Transport of the text control field ............................................................................................................... 88

6.7.3.1 SDC data entity type 1 labels ................................................................................................................ 88

6.7.3.2 Text messages ....................................................................................................................................... 89

6.7.4 Display of RTL and bidirectional text ........................................................................................................ 89

6.7.4.1 Introduction ........................................................................................................................................... 89

6.7.4.2 Minimum RTL implementation ............................................................................................................ 89

6.7.4.3 Simplified bidirectional algorithm ........................................................................................................ 90

7 Channel coding and modulation ............................................................................................................. 91

7.1 Introduction ...................................................................................................................................................... 91

7.2 Transport multiplex adaptation and energy dispersal ....................................................................................... 92

7.2.1 Transport multiplex adaptation ................................................................................................................... 92

7.2.1.0 General .................................................................................................................................................. 92

7.2.1.1 MSC ...................................................................................................................................................... 92

7.2.1.2 FAC ....................................................................................................................................................... 93

7.2.1.3 SDC ....................................................................................................................................................... 93

7.2.2 Energy dispersal .......................................................................................................................................... 94

7.3 Coding .............................................................................................................................................................. 95

7.3.1 Multilevel coding ........................................................................................................................................ 95

7.3.1.0 Introduction ........................................................................................................................................... 95

7.3.1.1 Partitioning of the bitstream .................................................................................................................. 96

7.3.2 Component code ......................................................................................................................................... 97

7.3.3 Bit interleaving ......................................................................................................................................... 103

7.3.3.0 Introduction ......................................................................................................................................... 103

7.3.3.1 FAC ..................................................................................................................................................... 103

7.3.3.2 SDC ..................................................................................................................................................... 104

7.3.3.3 MSC .................................................................................................................................................... 104

7.4 Signal constellations and mapping ................................................................................................................. 105

7.5 Application of coding to the channels ............................................................................................................ 107

7.5.1 Coding the MSC ....................................................................................................................................... 107

7.5.1.0 Introduction ......................................................................................................................................... 107

7.5.1.1 Coding ................................................................................................................................................. 107

7.5.2 Coding the SDC ........................................................................................................................................ 108

7.5.3 Coding the FAC ........................................................................................................................................ 109

7.6 MSC cell interleaving ..................................................................................................................................... 109

7.7 Mapping of MSC cells on the transmission super frame structure ................................................................. 111

8 Transmission structure ......................................................................................................................... 112

8.1 Transmission frame structure and robustness modes ..................................................................................... 112

8.2 Propagation-related OFDM parameters .......................................................................................................... 114

8.3 Signal bandwidth related parameters .............................................................................................................. 114

8.3.1 Parameter definition .................................................................................................................................. 114

8.3.2 Simulcast transmission ............................................................................................................................. 116

8.4 Pilot cells ........................................................................................................................................................ 116

8.4.1 Functions and derivation ........................................................................................................................... 116

8.4.2 Frequency references ................................................................................................................................ 116

8.4.2.0 Introduction ......................................................................................................................................... 116

8.4.2.1 Cell positions....................................................................................................................................... 117

8.4.2.2 Cell gains and phases .......................................................................................................................... 117

8.4.3 Time references ........................................................................................................................................ 118

8.4.3.0 Introduction ......................................................................................................................................... 118

8.4.3.1 Cell positions and phases .................................................................................................................... 118

8.4.3.2 Cell gains ............................................................................................................................................ 121

8.4.4 Gain references ............................................
...

SLOVENSKI STANDARD
SIST ES 201 980 V4.2.1:2021
01-junij-2021
Digitalni radio Mondiale (DRM) - Sistemska specifikacija
Digital Radio Mondiale (DRM) - System Specification
Ta slovenski standard je istoveten z: ETSI ES 201 980 V4.2.1 (2021-01)
ICS:
33.060.01 Radijske komunikacije na Radiocommunications in
splošno general
SIST ES 201 980 V4.2.1:2021 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ES 201 980 V4.2.1:2021
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SIST ES 201 980 V4.2.1:2021
ETSI ES 201 980 V4.2.1 (2021-01)
ETSI STANDARD
Digital Radio Mondiale (DRM);
System Specification
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SIST ES 201 980 V4.2.1:2021
2 ETSI ES 201 980 V4.2.1 (2021-01)
Reference
RES/JTC-DRM-35
Keywords
broadcasting, digital, DRM, radio
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All rights reserved.

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GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
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SIST ES 201 980 V4.2.1:2021
3 ETSI ES 201 980 V4.2.1 (2021-01)
Contents

Intellectual Property Rights ................................................................................................................................ 8

Foreword ............................................................................................................................................................. 8

Modal verbs terminology .................................................................................................................................... 8

Introduction ........................................................................................................................................................ 9

1 Scope ...................................................................................................................................................... 10

2 References .............................................................................................................................................. 10

2.1 Normative references ....................................................................................................................................... 10

2.2 Informative references ...................................................................................................................................... 11

3 Definition of terms, symbols, abbreviations and conventions ................................................................ 11

3.1 Terms ................................................................................................................................................................ 11

3.2 Symbols ............................................................................................................................................................ 12

3.3 Abbreviations ................................................................................................................................................... 13

3.4 Conventions ...................................................................................................................................................... 14

4 General characteristics ........................................................................................................................... 15

4.1 System overview .............................................................................................................................................. 15

4.2 System architecture .......................................................................................................................................... 15

4.3 Audio source coding ......................................................................................................................................... 17

4.4 Transmission modes ......................................................................................................................................... 18

4.4.1 Signal bandwidth related parameters .......................................................................................................... 18

4.4.2 Transmission efficiency related parameters ................................................................................................ 18

4.4.2.0 General .................................................................................................................................................. 18

4.4.2.1 Coding rates and constellations ............................................................................................................. 18

4.4.2.2 OFDM parameter set ............................................................................................................................. 18

5 Source coding modes.............................................................................................................................. 19

5.1 Overview .......................................................................................................................................................... 19

5.1.0 Introduction................................................................................................................................................. 19

5.1.1 Extended HE-AAC audio coding (xHE-AAC) ........................................................................................... 20

5.1.2 AAC audio coding ...................................................................................................................................... 20

5.1.3 MPEG Surround coding .............................................................................................................................. 22

5.2 Audio super framing ......................................................................................................................................... 22

5.3 xHE-AAC coding ............................................................................................................................................. 23

5.3.1 xHE-AAC ................................................................................................................................................... 23

5.3.1.0 Introduction ........................................................................................................................................... 23

5.3.1.1 xHE-AAC audio super frame ................................................................................................................ 24

5.3.1.2 xHE-AAC audio frame ......................................................................................................................... 25

5.3.1.3 Transport of xHE-AAC audio frames within the payload section ........................................................ 25

5.3.2 xHE-AAC decoder configuration ............................................................................................................... 27

5.3.3 xHE-AAC error concealment ..................................................................................................................... 30

5.3.3.0 Introduction ........................................................................................................................................... 30

5.3.3.1 Frequency Domain coding (AAC based coding and TCX) ................................................................... 30

5.3.3.2 ACELP .................................................................................................................................................. 31

5.3.3.3 SBR ....................................................................................................................................................... 31

5.3.3.4 MPS212 parametric stereo .................................................................................................................... 34

5.3.3.5 MDCT based Complex Prediction ........................................................................................................ 34

5.3.3.6 Forward Aliasing Cancellation.............................................................................................................. 34

5.3.4 xHE-AAC + MPS ....................................................................................................................................... 34

5.4 AAC coding...................................................................................................................................................... 35

5.4.1 AAC ............................................................................................................................................................ 35

5.4.2 AAC + SBR ................................................................................................................................................ 37

5.4.3 Parametric Stereo coding ............................................................................................................................ 38

5.4.4 AAC error concealment .............................................................................................................................. 39

5.4.4.0 Introduction ........................................................................................................................................... 39

5.4.4.1 Interpolation of one corrupt frame ........................................................................................................ 39

ETSI
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4 ETSI ES 201 980 V4.2.1 (2021-01)

5.4.4.2 Fade-out and fade-in ............................................................................................................................. 40

5.4.4.3 Concealment granularity ....................................................................................................................... 40

5.4.4.4 SBR error concealment ......................................................................................................................... 40

5.4.4.5 Parametric Stereo concealment ............................................................................................................. 43

5.4.5 AAC + MPS ................................................................................................................................................ 43

6 Multiplex definition ................................................................................................................................ 45

6.1 Introduction ...................................................................................................................................................... 45

6.2 Main Service Channel (MSC) .......................................................................................................................... 45

6.2.1 Introduction................................................................................................................................................. 45

6.2.2 Structure ...................................................................................................................................................... 45

6.2.3 Building the MSC ....................................................................................................................................... 45

6.2.4 Reconfiguration .......................................................................................................................................... 46

6.3 Fast Access Channel (FAC) ............................................................................................................................. 46

6.3.1 Introduction................................................................................................................................................. 46

6.3.2 Structure ...................................................................................................................................................... 46

6.3.3 Channel parameters..................................................................................................................................... 46

6.3.4 Service parameters ...................................................................................................................................... 49

6.3.5 CRC ............................................................................................................................................................ 51

6.3.6 FAC repetition ............................................................................................................................................ 51

6.4 Service Description Channel (SDC) ................................................................................................................. 52

6.4.1 Introduction................................................................................................................................................. 52

6.4.2 Structure ...................................................................................................................................................... 52

6.4.3 Data entities ................................................................................................................................................ 53

6.4.3.0 Introduction ........................................................................................................................................... 53

6.4.3.1 Multiplex description data entity - type 0 ............................................................................................. 54

6.4.3.2 Label data entity - type 1 ....................................................................................................................... 54

6.4.3.3 Conditional access parameters data entity - type 2 ............................................................................... 55

6.4.3.4 Alternative frequency signalling: Multiple frequency network information data entity - type 3 .......... 56

6.4.3.5 Alternative frequency signalling: Schedule definition data entity - type 4 ........................................... 58

6.4.3.6 Application information data entity - type 5 ......................................................................................... 58

6.4.3.7 Announcement support and switching data entity - type 6 ................................................................... 60

6.4.3.8 Alternative frequency signalling: Region definition data entity - type 7 .............................................. 62

6.4.3.9 Time and date information data entity - type 8 ..................................................................................... 63

6.4.3.10 Audio information data entity - type 9 .................................................................................................. 63

6.4.3.11 FAC channel parameters data entity - type 10 ...................................................................................... 66

6.4.3.12 Alternative frequency signalling: Other services data entity - type 11.................................................. 67

6.4.3.13 Language and country data entity - type 12 .......................................................................................... 71

6.4.3.14 Alternative frequency signalling: detailed region definition data entity - type 13 ................................ 71

6.4.3.15 Packet stream FEC parameters data entity - type 14 ............................................................................. 72

6.4.3.16 Extension data entity - type 15 .............................................................................................................. 73

6.4.3.16.0 General ............................................................................................................................................ 73

6.4.3.16.1 Service linking information data entity - type 15, extension 0 ........................................................ 73

6.4.3.16.2 Other data entity type 15 extensions ................................................................................................ 74

6.4.4 Summary of data entity characteristics ....................................................................................................... 75

6.4.5 Changing the content of the SDC ............................................................................................................... 76

6.4.6 Signalling of reconfigurations..................................................................................................................... 77

6.4.6.0 Introduction ........................................................................................................................................... 77

6.4.6.1 Service reconfigurations ........................................................................................................................ 77

6.4.6.2 Channel reconfigurations ...................................................................................................................... 78

6.5 Text message application ................................................................................................................................. 78

6.6 Packet mode ..................................................................................................................................................... 80

6.6.0 Introduction................................................................................................................................................. 80

6.6.1 Packet structure ........................................................................................................................................... 80

6.6.1.0 Introduction ........................................................................................................................................... 80

6.6.1.1 Header ................................................................................................................................................... 81

6.6.1.2 Data field ............................................................................................................................................... 81

6.6.2 Asynchronous streams ................................................................................................................................ 82

6.6.3 Files ............................................................................................................................................................ 82

6.6.4 Choosing the packet length ......................................................................................................................... 82

6.6.5 Forward Error Correction (FEC) for packet mode streams ......................................................................... 82

6.6.5.0 Introduction ........................................................................................................................................... 82

ETSI
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6.6.5.1 Encoding of FEC Packets ...................................................................................................................... 83

6.6.5.2 Transport of FEC packets ...................................................................................................................... 85

6.6.5.3 Receiver considerations ........................................................................................................................ 86

6.7 Presentation of service labels and text messages .............................................................................................. 86

6.7.1 Introduction................................................................................................................................................. 86

6.7.2 Encoding of the text control field ............................................................................................................... 87

6.7.3 Transport of the text control field ............................................................................................................... 88

6.7.3.1 SDC data entity type 1 labels ................................................................................................................ 88

6.7.3.2 Text messages ....................................................................................................................................... 89

6.7.4 Display of RTL and bidirectional text ........................................................................................................ 89

6.7.4.1 Introduction ........................................................................................................................................... 89

6.7.4.2 Minimum RTL implementation ............................................................................................................ 89

6.7.4.3 Simplified bidirectional algorithm ........................................................................................................ 90

7 Channel coding and modulation ............................................................................................................. 91

7.1 Introduction ...................................................................................................................................................... 91

7.2 Transport multiplex adaptation and energy dispersal ....................................................................................... 92

7.2.1 Transport multiplex adaptation ................................................................................................................... 92

7.2.1.0 General .................................................................................................................................................. 92

7.2.1.1 MSC ...................................................................................................................................................... 92

7.2.1.2 FAC ....................................................................................................................................................... 93

7.2.1.3 SDC ....................................................................................................................................................... 93

7.2.2 Energy dispersal .......................................................................................................................................... 94

7.3 Coding .............................................................................................................................................................. 95

7.3.1 Multilevel coding ........................................................................................................................................ 95

7.3.1.0 Introduction ........................................................................................................................................... 95

7.3.1.1 Partitioning of the bitstream .................................................................................................................. 96

7.3.2 Component code ......................................................................................................................................... 97

7.3.3 Bit interleaving ......................................................................................................................................... 103

7.3.3.0 Introduction ......................................................................................................................................... 103

7.3.3.1 FAC ..................................................................................................................................................... 103

7.3.3.2 SDC ..................................................................................................................................................... 104

7.3.3.3 MSC .................................................................................................................................................... 104

7.4 Signal constellations and mapping ................................................................................................................. 105

7.5 Application of coding to the channels ............................................................................................................ 107

7.5.1 Coding the MSC ....................................................................................................................................... 107

7.5.1.0 Introduction ......................................................................................................................................... 107

7.5.1.1 Coding ................................................................................................................................................. 107

7.5.2 Coding the SDC ........................................................................................................................................ 108

7.5.3 Coding the FAC ........................................................................................................................................ 109

7.6 MSC cell interleaving ..................................................................................................................................... 109

7.7 Mapping of MSC cells on the transmission super frame structure ................................................................. 111

8 Transmission structure ......................................................................................................................... 112

8.1 Transmission frame structure and robustness modes ..................................................................................... 112

8.2 Propagation-related OFDM parameters .......................................................................................................... 114

8.3 Signal bandwidth related parameters .............................................................................................................. 114

8.3.1 Parameter definition .................................................................................................................................. 114

8.3.2 Simulcast transmission ............................................................................................................................. 116

8.4 Pilot cells ........................................................................................................................................................ 116

8.4.1 Functions and derivation ........................................................................................................................... 116

8.4.2 Frequency references ................................................................................................................................ 116

8.4.2.0 Introduction ......................................................................................................................................... 116

8.4.2.1 Cell positions....................................................................................................................................... 117

8.4.2.2 Cell gains and phases .......................................................................................................................... 117

8.4.3 Time referen
...

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